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Late-time photometry of two nearby type Ⅱ-P supernovae: 2004dj and 2004et
TianMeng Zhang1; XiaoFeng Wang2; Xu Zhou1; Jun Ma1; ZhaoJi Jiang1; JiangHua Wu1; ZhenYu Wu1; Stphane Basa3
2009
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume9Issue:7Pages:783
AbstractWe present late-time photometry for two bright type Ⅱ-P supernovae (SNe) 2004dj and 2004et, extending over 400 d after the explosion, which are measured with a set of intermediate-band filters that have the advantage of tracing the strength variations of some spectral features. Although these two SNe Ⅱ-P exhibit similar photometric evolution at earlier times, they diverge during the nebular phase. SN 2004dj shows a slow late-time decline rate with ~0.7±0.1 mag (100d)~(-1) during the period ranging from t≈200-300 d after the explosion, while SN 2004et shows a much faster decline rate at a comparable phase, e.g., 1.3±0.1 mag (100d)~(-1). The steeper decay rate seen in SN 2004et is likely due to dust formation in the explosion ejecta. Based on intermediate-band photometry, we derived the evolution of the feature lines e.g., Hα of SNe 2004dj and 2004et which are similar in flux at comparable phases but perhaps with significantly different decay rates. The origin of the observed variations in the continuum and the feature lines is briefly discussed.
Keywordsupernovae: general supernovae: individual (SN 2004dj SN 2004et) techniques: photometric
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/68684
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.清华大学
3.Observatoire Astronomique de Marseille-Provence
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
TianMeng Zhang,XiaoFeng Wang,Xu Zhou,et al. Late-time photometry of two nearby type Ⅱ-P supernovae: 2004dj and 2004et[J]. Research in Astronomy and Astrophysics,2009,9(7):783.
APA TianMeng Zhang.,XiaoFeng Wang.,Xu Zhou.,Jun Ma.,ZhaoJi Jiang.,...&Stphane Basa.(2009).Late-time photometry of two nearby type Ⅱ-P supernovae: 2004dj and 2004et.Research in Astronomy and Astrophysics,9(7),783.
MLA TianMeng Zhang,et al."Late-time photometry of two nearby type Ⅱ-P supernovae: 2004dj and 2004et".Research in Astronomy and Astrophysics 9.7(2009):783.
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